Dredge.



PATENTED JAN. 23, 1906.

A. J. BUROHAM.

DREDGE.

APPLICATION FILED 001x 30,1905.

3 SHEETS-SHEET 1.

INVENTOR IB RC A W;

m R w A ATTORNEYS PATENTED JAN. 23,1906.

A. 'J. BURGHAM.

DREDGE. APPLICATION FILED OCT. 30, 1905.

3 SHEETS-SHEET 2.

' ATTORNEYS A. J. BUROHAML.

QREDGE. APPLICATION FILED OGT. 30, 1905.

PATENTED JAN. 23, 1906v 3 sHBBTssHET s.

INVENTOI? AND EW JIBURCHAM nnirnn snares ATENT ANDREW J. BURCHAM, OF KELSO, WASHlNUTON.

entrees.

sis. 519,736.

Specification of LetterePatent.

"E'atented Jan. 523, 19GB.

Application filed October 30,1905. Berial No. 286,121

scraper adapted to be operated on land or from a float on water for use in deepening or widening river-beds or opening canals, building levees, or working river-beds in placer .nnning, and for other'allied purposes.

The details of construction, arrangement, and operation of the machine are as hereinafter described, the novel features being specifically indicated in the claims.

In the accompanying drawings, Figure 1 is a pore active View of the machine as set upon a bang and. operating in a canal, river, or ditch. Fig. 2 is a face view of the machine. Fig. 3 is a central vertical section. Fig. 4 is a perspective view of one of the diggers and scrapers, together'with the art to which it is ivoted. Fig. 5 is a detai section illustrating the means for locking the swinging beams that carry the diggers with booms extending laterally from the frame of the machine.

The movable parts of the machine are attached to or connected with a frame A, comprising vertical standards or guides 1, lateral braces 2 therefor, and rear lnclmed braces 3,

all of which are set upon and secured to a horizontal base at. The standards 1 are connected with the rear braces 3 by bars 5, and the braces 3 are connected b bars '3, which serve a ladder. The stan ards 1 are suitably secured to the base 4:. The base may be set upon land at the edge of the bank of a canal or stream, as indicated in Fig. 1, or

'. placed upon and secured to the bow of a boat,

.sccw, ordeal; of any character. The standards 1 are spaced apart and between them slides a block B, to which are connected swinging beams C, that carry the diggers and scrapers D. The parts 1 1 thus serve as vertical guides, leaders, or gins, as they are-variously termed, and in this respect are similar to the guides or leaders provided on pile-drivers.

A. block 8 is attached. to the block 9, which slides between the leaders 1 and extr ds across the faces of the latter, as shown. The beams C C are-pivoted to the face of this block 8 in such manner that their lower ends are adapted to swing laterally toward and from each ends.

other. The diggers and scrapers D are pivoted to the lower. ends of. the beams C, the particular means of attachment being iron straps 10, which are bent laterally, the diggers being pivoted at 11 between their lower A rope or chain 12 passes over pulleys 13, journaled in a block secured upon the head 14 of the frame A, and extends down and is connected with the beams the latter having slots through which the rope is passed and then joined to itself, thus forming a loop 15. Pulleys 16 (see Figs. 2 and 3) are journaled in the aforesaid'slots. The rope orchain 12 serves to raise and lower the beams (l (1, together with the diggers D and the block B. It is apparent, however, that when strain is applied to the rope 12 the tendency ol the loop is to draw the beams C toward each other or together, as well as tolift them along with the block B. The rope 12 passes to tho winding-drum of an engine. (Not shown.)

Booms Ear-e pivoted to the frame A on each side thereof near the base 4.. he booms are formed of two divergent beams 16, whose of the booms and pass over pulley l8, '(lllll'r nected with the head of the frame A, and thence to a winding-drum on the engine. By means of these ropes 17 it is apparent that the booms may be raised or lowered, as corn ditionsmay require. As shown, the front beam of each boom is hinged to a beam 19, extendingacross the front of the guides or leaders 1 and securely bolted thereto, and sheet metal .40 is applied thereto in such manner as to serve as a fender by diverting mud, earth, stones, &c., l'rom'tho beam in the operation of the machine. It will be understood, however, that thisis a detail, and tho booms may be otherwise attached to the frame A.

The diggers and scrapers D are preferably constructed of boiler-plate 21, the same being curved, and broad sides 22 being attached, so as to subserve twopurposesnamely, to retain a due quantity of mud, sand, gravel, stone, or other material taken up by the diggers while the same are being hoisted and also'as means for attachment of ropes or chains 23, the same passing over pulleys 24 at the outer ends of the booms E, thence over pulleys 25 on the frame A, and finally to a drum (not shown) on the engine. One end of thcscraper-body 21 is preferably serrated and the other plain or straight for the purpose of adapting one end or the digger to 'work in ravel .or stony beds and the other in mud, sand, or soft material. The part 21' is provided with a number of perforations'm the bottom portion to allow escape of water that may be taken up in the digging operation, and also to allow admission of air when the contents of the diggers are being discharged. It will now be understood-that if the machine be placed at the edge of a bank or lo.- cated upon a float upon releasing the. ropes 12 and 23 the beams O and the block B will be lowered, thus carrying the diggersD directly downward and allowing them to strike upon the bottom in such manner that the lower edge takes into the bottom of the canal or river bed. Traction being then simultaneously ap lied to the re cs 12 and 23, it is apparent t e diggers will e hauled laterally or apart from each other, and thereby caused to be picked up filled with material, and, traction being continued, theyare carried up out of the water-say to the position indicated in Fig. 2, where the beams C must be temporarily locked while the dredges or huc ets D are being itilted and discharged of their contents. For this purpose lemploy dogs or pawls F, (see Figs. 1, 2, 5,) the same being constructed of metal and pivoted in slots 25 and provided with an angular nose 27, that normally projects i'rom the slot,'

whereby they are adapted to ride over the side of the front beams of the boom E when the diggers D are raised, as indicated in Fig. 2. It'is apparent that as soon as the dogs F shall have passed to the upper side of the booms E upon slackening the ro cs 23 the dogs will engage the booms, and t 1115 hold or look the diggers in elevated osition, so that upon further loosening of t e ropes 23 the diggers will tilt and discharge their contents.

This discharge maybe into scows or other receptacles or upon the banks, as the case may be. It is obvious that the booms E may be set at different inclinations, according to the heightto which it is desired to raise the diggers with their loadbefore discharging the atter. Upon again applying due tension to the ropes 23 the beams 0 will be raised, so that the dogs may be released from the booms and the beams C allowed to swing back to their normal vertical osition, when the operation already descrigbd may be repeated.

It is apparent that by the construction of a dredging-machine in the manner already described I am able to utilize a frame such as employed in pile-drivin and that the opera tion of the same is simp e, while it is capable of performing a large amount of work, particularly by reason of the fact that two diggers and scrapers are operated simultane ously, whereas in machines ofthis general class a single digger is ordinarily employed.

scribed.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

' 1. The improved dredging and scraping machine com rising a frame having a vertical guide, ab ock adapted to slide vertically on said guide, beams pivoted to said block,

and diggers pivoted to the lower ends of the same, the beams being'adaptedto swing laterally, booms pivoted-to the sides of theframe,

and means for locking the swinging. beams therewith when the diggers are elevated, and

means for raising and lowerin the booms i with the dig ers and also the beams and for raising the iggers to the position required fordischarging their load, substantla ly' as described.

2. The improved dredge: comprising a" frame having vertical guides,a block adapt- "ed to slide vertically between them, beams pivoted to the block, and diggers pivoted to the lower ends of the same an provided with arms arranged at an angle to their digging and scraping edges, a hoisting and lowering rope connected with the digger-beams and the aforesaid block, booms pivoted to the.

sidescf the frame, and means for raising and lowering them, ropes or chains connected I with the diggers and connected with the outer ends of the booms, whereby the diggers may be hauled laterally-outward and up ward, and means for locking the diggerbeams with the boom for sup iorting the digggers while their load is being ischarged, sub: stantially as described.

3. The combination, Witha suitable frame having vertical guides and a block adapted to slide on the guides, of beams pivoted to such block, and diggers pivoted in the lower ends of the bcams, a hoisting and lowering rope passing over the top of the frame and having a loop extending throu h slots in the digger-beams at a point some istance below their pivots, and means for hauling the diggers proper laterally, substantial y as de- 4. In a dredger of the-class indicated, the

combination, with a suitable frame, of pivoted-beams made vertically adjustable, dig-.

gers connected with their lower ends, and means for hoisting the dl ger-beams anddi gers, and also hauling t 1e latteroutward y i stentially as described.

pivoted to each of the digger-beams and beam, of a. digger proper comprising a curved adapted toslide over and engage a boom, and plate having perforations in its middle por- 10 means for raising the digger-beams and digtion, and, side bars extending outwardly ger and for hauling the digger laterally, and therefrom, substantially as described. for adjusting the boom' higher 01' lower, sub- ANDR EVV. J. BURCHAM.

- Witnesses:

7. In a ,dredger of the class indicated, the J. S. HUNTINGTON,

combination, with the pivoted swinging ALBERT BURCHAM. 

